Kayaking Safety - The EssentialsWatch this short video to learn how youcan insure that your paddling experiencewill be relatively safe for all involved.Training Canoe Newbies Over the years, Cliff Jacobson has formed afew tests to get new canoeists ready to run whitewater rivers. Read all about them.

Same same for me, my rolls are not all equal on both sides but I can't attribute any differences to the zipper. For whatever reason the reverse sweep is stronger on the left, while all the other rolls are usually better on the right,(usually). I do practice quite a bit more than most folks,(wet suit, w/wo drytop, drysuit, w/wo extra layers), and haven't noticed much difference other than making minor adjustments. Could be you're not tucking the same on both sides that is the cause of the "drag". For me, I notice a significant difference of resistance with one of my skirts.